35results about How to "Large boost ratio" patented technology

The invention discloses a threaded self-locking type automatic centering work fixture used for an annular workpiece. The automatic centering work fixture comprises a base plate, a folded bent arm I, a folded bent arm II, a bevel pushing head which matches the folded bent arm I and the folded bent arm II to push the annular workpiece tightly, a driving screw rod used for driving the bevel pushing head to move forward and backward and a screw rod seat which matches the driving screw rod to form a threaded transmission pair. The upper side of one end of the base plate is rotatably provided with the folded bent arm I and the folded bent arm II which are arranged symmetrically, while the upper side of the other end of the base plate is fixedly installed with the screw rod seat. The driving screw rod is installed on the screw rod seat through a threaded hole .The end of the driving screw rod is rotationally connected with the rear end of the bevel pushing head by a connection seat and the fore end of the bevel pushing head is fixedly installed with a pushing block. The fixture provided by the invention has the characteristics of being reasonable in design, simple in structure, capable of excircle centering clamping, high in force increasing ratio, good in self-locking property, convenient to operate and long in service life.

The invention relates to a traveling type automatic material loading patching machine device. The device comprises a device body rack, a charging hopper, a patching machine and a hydraulic pressure oil cylinder used for loading material. The device is characterized in that the charging hopper is in a hinged connection with a hinged joint point which is close to device body rear portion, the upper portion of the charging hopper is in a hinged connection with a hinged joint point which is close to the head portion of the device body sequentially through a pair of pull rods and a pair of connecting rods which are in the hinged connection, the hydraulic pressure oil cylinder is installed at the front of the charging hopper, a cylinder body of the hydraulic pressure oil cylinder is in a hinged connection with a hinged joint point which is close to the middle of the device body, a push rod of the hydraulic pressure oil cylinder is in a hinged connection with a hinged joint point of the pull rods and the connecting rods, and therefore a five-connecting rod charging mechanism composed of the device body rack, connecting rods, the hydraulic pressure oil cylinder, the push rod and the charging hopper is formed to load materials. According to the traveling type automatic material loading patching machine device, the complete device is beneficial to widening the charging hopper and substantially increasing the hopper capacity, and the hopper capacity can be increased by about 100%, lifting and turning performances are stable, the charging operation is convenient, the structure is simple, the device is energy-saving and environment-friendly, and the cost is low.

The invention discloses a stress-relieving device for seamless rails by using a vibration method and a stress-relieving method, and is implemented by carrying out field detection on the stress-relieving effect of rails mainly by using a device for realizing the stress homogenization of rails in a periodic-vibration gas-liquid pressurized mode and supplementarily by using a stress sensor, and then carrying out stress-relieving operation in a machine-liquid-electricity integrated automatic mode. The whole stress-relieving device disclosed by the invention is light in weight, and provided with an anti-overturn device for ensuring a trolley is not overturned to the side during the operation of the trolley, thereby reducing the labor intensity and improving the operating efficiency and quality.

The invention provides a pressurizing device. The pressurizing device comprises a pressurizing cylinder and an integrated valve block, wherein the pressurizing cylinder comprises a primary piston (10), a secondary piston (20) and a cylinder tube (30), the primary piston (10) is sleeved in an inner cavity of the secondary piston (20), and the secondary piston (20) is sleeved in an inner cavity of the cylinder tube (30); the integrated valve block comprises a valve body (200), the valve body (200) is provided with an inner cavity (201), the valve body (200) is respectively provided with a through hole at two ends of the inner cavity (201), five annular through holes are radially arranged between the wall surface of the outer wall and the inner cavity (201) of the valve body (200), the inner cavity (201) is internally sleeved with a valve core (220), and a zero-opening two-position four-way reversing valve is formed in a way that the valve core (220) is matched with the inner cavity (201). Compared with a pressurizing device in the prior art, the pressurizing device provided by the invention is small in size, has no participation of an electric control system and is simple in system.

The invention discloses a manual adjustment tapered wedge type closed die height adjusting device. The manual adjustment tapered wedge type closed die height adjusting device comprises a rack assembly, a sliding block assembly, a connecting rod assembly, a tapered wedge assembly, an oil cylinder assembly, a transmission adjusting assembly and an auxiliary guide assembly. The sliding block assembly is mounted on the rack assembly through the connecting rod assembly, and the tapered wedge assembly is connected with the sliding block assembly through the oil cylinder assembly and the auxiliary guide assembly; the oil cylinder assembly, the auxiliary guide assembly and the transmission adjusting assembly are all connected to the sliding assembly; power drives the connecting rod assembly to move, and the connecting rod assembly further drives the sliding block assembly to do reciprocating operation along the assembling position of the rack assembly; and when the transmission adjusting assembly is affected by external force, the tapered wedge assembly is adjusted, and therefore the sliding block assembly, the oil cylinder assembly and the auxiliary guide assembly are adjusted, and finally, fine adjustment of die filling height can be achieved. Through cooperative use of an upper tapered wedge, a lower tapered wedge and a sliding block, the adjustment precision, stability and portability of the closed die height can be improved, and accurate die adjusting of different materials can be achieved.

The invention discloses a space on-track repeated locking and releasing mechanism, relating to a repeated locking and releasing mechanism. The invention aims to solve the problem in on-track repeated locking and releasing of large payload on spacecraft. The mechanism comprises a locking trunnion mechanism, a compaction lock hook mechanism, a locking base mechanism, a crank-rocker mechanism and a drive gear mechanism, wherein the locking trunnion mechanism is arranged at the upper end of the locking base mechanism; and the drive gear mechanism is connected with the compaction lock hook mechanism and the crank-rocker mechanism respectively. In the invention, the locking trunnion mechanism, the compaction lock hook mechanism, the locking base mechanism, the crank-rocker mechanism and the drive gear mechanism are crossed, the structure is simple and compact, all degrees of freedom of the fixed object can be completely limited, the repeated locking can be realized, the operability is good, and the using requirement of on-track locking-releasing-locking can be met. The mechanism disclosed by the invention is applicable to the technical field of aerospace and mechatronics.

The invention discloses an integrated valve block and belongs to the field of hydraulic technology. The integrated valve block comprises a valve body (200) provided with an inner cavity (201). Through holes are formed at two ends of the inner cavity (201) of the valve body (200). Five annular through holes are radially formed between the outer wall face of the valve body (200) and the inner cavity. A valve element (220) is nested into the inner cavity (201). Four coaxial cylinders with the same cross section are disposed at intervals in the axial direction of the valve element (220). The four cylinders of the valve element (220) are matched with the inner cavity (201) to form a zero-openness two-position four-way reversing valve. Compared with the prior art, the integrated valve block is free of an electric control system and simple in system.

The invention provides a multi-connecting-rod mechanical press driven by three parallel servo motor inputs, which is characterized in that the press comprises a rack, a three-motor and three-degree-of-freedom parallel mechanism, a connecting mechanism, a toggle rod mechanism and a pressing sliding block, wherein the output end of the three-motor and three-degree-of-freedom parallel mechanism is movably connected with the input end of the connecting mechanism, the output end of the connecting mechanism is movably connected with the input end of the toggle rod mechanism, the pressing sliding block is the output end of the toggle rod mechanism, and the rack is sheathed on the external sides of the three-motor and three-degree-of-freedom parallel mechanism, the connecting mechanism, the toggle rod mechanism and the pressing sliding block. The press has the advantages of simple structure, easiness in control and low manufacturing cost and can well solve the problem that a large-tonnage servo press cannot be constructed because the output torque and the power of the existing servo motor are small.

The invention discloses a coupled inductance step-up inverter and a control method thereof, belonging to the technical field of power electronic converters. It includes diode D 1 、D 2 、D S3 and D S4 , switch tube S 1 , S 2 , S 3 , S 4 and S 5 ; The primary winding N of the coupled inductor T 1 and the secondary winding N 2 ; Capacitance C 1 ; Diode D 1 The anode is connected to the input power supply U in One end, the diode D 1 The cathode is connected to the primary winding N of the coupled inductor T 1 Terminal of the same name; primary winding N of coupled inductor T 1 Non-identical end and switch tube S 1 Terminal A, switch tube S 2 A terminal and capacitor C 1 Connected at one end; switch tube S 1 C terminal, diode D 3 Cathode, switch tube S 5 A terminal and input power U in The other end is connected; diode D 3 anode, diode D 2 Cathode and Capacitor C 2 connected at one end. Aiming at the problem of low boost ratio in the prior art boost inverter, it has high integration, high boost ratio and more flexible regulation of boost ratio.

The invention discloses a double-V-shaped-block parallel synchronization lifting mechanism which comprises a hand wheel, bevel gears, a right rotating lead screw, a left rotating lead screw, a lead screw guiding sleeve, a lead screw guiding rotating stopping flat key and the like. A first bevel gear is fixedly arranged at the end of a hand wheel rotating shaft and is meshed with a second bevel gear arranged on a supporting plate. One end of a spline telescopic joint sleeve transmission shaft is fixedly provided with a third bevel gear which is meshed with the second bevel gear, and the other end of the spline telescopic joint sleeve transmission shaft is fixedly provided with a fourth bevel gear which is meshed with a fifth bevel gear. The two lead screws which are the same in lead and opposite in rotating direction are screwed on the second bevel gear and the fifth bevel gear through lead screw nuts which are placed at the circular centers of the second bevel gear and the fifth bevel gear and are integrally machined with the two bevel gears respectively. The upper ends of the two lead screws are respectively provided with a V-shaped block. According to the double-V-shaped-block parallel synchronization lifting mechanism, the bevel gears are driven by rotating the hand wheel, then the lead screws drive the two V-shaped blocks to move up and down synchronously, fine adjustment effect is good, accumulative errors are avoided, the force increasing ratio of the whole mechanism is large, and the hand wheel is convenient to use.

The invention discloses a manual pressing device based on worms, worm wheels and crank connecting rod transmissions. The manual pressing device comprises a rotary shaft, wherein at least two worms are fixedly arranged on the rotary shaft, the worm wheels meshed with the worms are arranged under the corresponding worms, the crank connecting rod transmissions are arranged on the worm wheels, and the tail ends of the crank connecting rod transmissions are connected to the same press block. The symmetrical synchronous multi-point driving is achieved, the manual pressing device is compact in structure, simple and convenient to use and rapid in positioning and pressing, the synchronous multi-point or multi-station pressing can be achieved according to the demands of workpieces, and accordingly labor productivity and product quality are improved.